| 4201 | C & A Oil Company | Edmond, OK 73013-9413 | Oil & Gas Operator | Mar 2015 |
| 4202 | C & B Energy Resources | Bartlesville, OK 74006 | Oil & Gas Operator | Mar 2015 |
| 4203 | C & B Exploration Company, Inc. | | Oil & Gas Operator | Oct 2008 |
| 4204 | C & B Exploration, LLC | Fort Worth, TX 76179 | Oil Operator | Jun 2026 |
| 4205 | C & B Operating Inc. | St John, KS 67576 | Oil & Gas Operator | Feb 2026 |
| 4206 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | Jun 2026 |
| 4207 | C & C Downhole, LLC | Richmond, KY 40475 | Oil & Gas Operator | Dec 2024 |
| 4208 | C & C Minerals LTD | | Oil & Gas Operator | Dec 2019 |
| 4209 | C & C Oil | | Oil & Gas Operator | Jan 2004 |
| 4210 | C & C Oil & Gas | Ranger, TX 76470 | Oil & Gas Operator | Jun 2026 |
| 4211 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Apr 2026 |
| 4212 | C & C Oil Producers | Borger, TX 79008 | Oil & Gas Operator | Jun 2026 |
| 4213 | C & C Operating, Inc. | | Oil Operator | Dec 2024 |
| 4214 | C & C Operating, LLC | Iowa Park, TX 76367 | Oil Operator | Jun 2026 |
| 4215 | C & C Petroleum Management, LLC | Abilene, TX 79601 | Oil & Gas Operator | Jun 2026 |
| 4216 | C & C Producing LLC | Creston, OH 44217 | Oil & Gas Operator | Dec 2025 |
| 4217 | C & C Productions LLC | Muskogeee, OK 74402 | Oil & Gas Operator | Mar 2026 |
| 4218 | C & C Tank Service LLC | | Oil & Gas Operator | Sep 2022 |
| 4219 | C & C Tank Service, Inc. | Sterling, KS 67579 | Oil Operator | Oct 2020 |
| 4220 | C & C Tank Truck Service Inc | Holdenville, OK 74848 | Oil Operator | Feb 2012 |
| 4221 | C & D Drilling Company | Hennepin, OK 73046 | Oil & Gas Operator | Mar 2007 |
| 4222 | C & D Energy Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1994 |
| 4223 | C & D Gas Co | Apollo, PA 15613-9714 | Oil & Gas Operator | Dec 2025 |
| 4224 | C & D Oil & Gas LLC | Dorset, OH 44032 | Oil & Gas Operator | Dec 2025 |
| 4225 | C & D Resources, Inc. | | Oil & Gas Operator | Nov 2001 |
| 4226 | C & D Supply | Cherokee, OK 73728-5817 | Oil & Gas Operator | Mar 2026 |
| 4227 | C & D Supply LLC | Cherokee, OK 73728-5817 | Oil & Gas Operator | Mar 2026 |
| 4228 | C & E Oil Company | Corpus Christi, TX 78418 | Oil Operator | Jan 1989 |
| 4229 | C & E Oil, LLC | Grenola, KS 67346 | Oil Operator | Nov 2021 |
| 4230 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | Jun 2026 |
| 4231 | C & E Prod Incor | | Oil Operator | Nov 1996 |
| 4232 | C & F Energy, Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 1996 |
| 4233 | C & F Oil Company, Inc. | | Oil Operator | Jan 2025 |
| 4234 | C & F Petroleum | | Oil & Gas Operator | Apr 1991 |
| 4235 | C & F Petroleum, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | May 2013 |
| 4236 | C & F Ranch LLC | Iola, KS 66749 | Oil Operator | Dec 2025 |
| 4237 | C & G Drilling, Inc | Eureka, KS 67045 | Oil Operator | Feb 2026 |
| 4238 | C & G Energy Inc | | Oil & Gas Operator | Jun 1996 |
| 4239 | C & G Oil Compan | | Oil & Gas Operator | Dec 1989 |
| 4240 | C & G Operating, LLC | San Antonio, TX 78209 | Oil Operator | Jun 2026 |
| 4241 | C & G Petroleum, Inc. | Imperial, TX 79743 | Oil & Gas Operator | Aug 2004 |
| 4242 | C & G Transports, Inc. | Woodson, TX 76491 | Oil & Gas Operator | Jun 2026 |
| 4243 | C & H Energy LLC | Blue Mound, KS 66010 | Oil Operator | Nov 2009 |
| 4244 | C & H Oil Company | Ratliff City, OK 73481-0130 | Oil & Gas Operator | Apr 2015 |
| 4245 | C & H Well Servicing Inc | Gillette, WY 82717 | Oil & Gas Operator | Apr 2026 |
| 4246 | C & J Exploration LLC | Colorado Springs, CO 80920-3946 | Oil & Gas Operator | Oct 2022 |
| 4247 | C & J Field Services | | Oil & Gas Operator | Apr 2026 |
| 4248 | C & J Oil | | Oil & Gas Operator | Dec 2025 |
| 4249 | C & J Production LLC | Marion, KS 66861 | Oil & Gas Operator | Feb 2025 |
| 4250 | C & J Pumping, Inc. | Sylvia, KS 67581 | Oil & Gas Operator | Dec 2009 |
| 4251 | C & J Trucks LLC | Seminole, OK 74868-5406 | Oil & Gas Operator | May 2026 |
| 4252 | C & J Well No 1 And C & J Well No 2 | Philippi, WV 26416 | Gas Operator | Dec 2021 |
| 4253 | C & K Offshore Company | | Oil & Gas Operator | Oct 1980 |
| 4254 | C & K Operating LLC | Kingman, KS 67068 | Oil & Gas Operator | Feb 2026 |
| 4255 | C & K Petroleum | | Oil & Gas Operator | Jan 1984 |
| 4256 | C & K Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 1984 |
| 4257 | C & L Drilling Company | Ada, OK 74821-1252 | Oil & Gas Operator | Jan 2014 |
| 4258 | C & L Enterprise Of Wagoner | Coweta, OK 74429-9657 | Oil Operator | Mar 2001 |
| 4259 | C & L Enterprises Inc | Lindsay, OK 73052 | Oil & Gas Operator | Apr 2026 |
| 4260 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Apr 2026 |
| 4261 | C & L Oil Company | Cross Plains, TX 76443 | Oil & Gas Operator | Jun 2026 |
| 4262 | C & L Operating, Inc. | Valera, TX 76884 | Oil & Gas Operator | Jun 2026 |
| 4263 | C & M Exploration LLC | Tulsa, OK 74159-1331 | Oil & Gas Operator | Jun 2014 |
| 4264 | C & M Oil Co. & Investments | | Oil & Gas Operator | Jan 2026 |
| 4265 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Mar 2026 |
| 4266 | C & M Operating, Inc. (A) | Alleyton, TX 78935 | Gas Operator | Aug 2011 |
| 4267 | C & N Oil & Gas Company | Albany, OH 45710 | Oil & Gas Operator | Dec 2012 |
| 4268 | C & N Oil Co | Monahans, TX 79756 | Oil Operator | Jun 2026 |
| 4269 | C & N Royalties, L.L.C. | | Oil & Gas Operator | Oct 2015 |
| 4270 | C & O Production | Nocona, TX 76255 | Oil & Gas Operator | Feb 2020 |
| 4271 | C & P Energy Inc | Hampton, AR 71744 | Oil Operator | Dec 2014 |
| 4272 | C & P Land Services Limited Liability Company | Los Angeles, CA 90035 | Oil Operator | Jun 2026 |
| 4273 | C & R Drilling C | | Oil Operator | Aug 1994 |
| 4274 | C & R Oil | | Oil Operator | Feb 2026 |
| 4275 | C & R Oil Co. | Abilene, TX 79605 | Oil & Gas Operator | Jun 2026 |
| 4276 | C & R Petroleum Company | Duncan, OK 73533-1341 | Oil & Gas Operator | Feb 2026 |
| 4277 | C & R Well Servi | | Oil Operator | Sep 1996 |
| 4278 | C & R Well Service, A General Partnership | Garnett, KS 66032 | Oil Operator | Dec 2009 |
| 4279 | C & S Energy Corp | Liverpool, NY 13088 | Oil & Gas Operator | Dec 1986 |
| 4280 | C & S Oil | | Oil Operator | Dec 2019 |
| 4281 | C & S Oil Compan | | Oil & Gas Operator | Jun 1992 |
| 4282 | C & S Oil Company | Odessa, TX 79763 | Oil & Gas Operator | Nov 2019 |
| 4283 | C & S Oil Company, LLC | Russell, KS 67665 | Oil Operator | Feb 2026 |
| 4284 | C & S Operating | Whiteface, TX 79379 | Oil & Gas Operator | Jun 2026 |
| 4285 | C & S Properties | | Oil & Gas Operator | Jun 1996 |
| 4286 | C & S Well Servi | | Oil & Gas Operator | Nov 1995 |
| 4287 | C & S Well Servicing Co. | Lyons, KS 67554 | Oil & Gas Operator | Jul 2000 |
| 4288 | C & T Energy Co | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2004 |
| 4289 | C & T Energy LLC | Morris, OK 74445-2667 | Oil & Gas Operator | Mar 2026 |
| 4290 | C & T Energy Of East Canton Inc | East Canton, OH 44730 | Oil & Gas Operator | Dec 2024 |
| 4291 | C & V Oil And Gas | Marietta, OH 45750 | Oil & Gas Operator | Dec 2011 |
| 4292 | C & VC, Inc. | | Oil & Gas Operator | Sep 1991 |
| 4293 | C & W Oil Inc | | Oil & Gas Operator | Aug 2016 |
| 4294 | C & W Operating LLC | Tulsa, OK 74145-7627 | Oil Operator | May 2020 |
| 4295 | C & Y Casing Pulling Company | Duncan, OK 73533 | Oil & Gas Operator | Apr 2026 |
| 4296 | C A P Operating | | Oil Operator | Sep 1992 |
| 4297 | C And D Explorations LLC | | Oil Operator | May 2026 |
| 4298 | C And M Oil Inc | Kimball, NE 69145 | Oil & Gas Operator | Dec 2024 |
| 4299 | C And S Oil & Gas | San Antonio, TX 78217 | Oil & Gas Operator | Feb 1998 |
| 4300 | C Bar K Enterprises Inc | Oklahoma City, OK 73154-1828 | Oil & Gas Operator | Dec 2022 |